Apparatus for molding water



May 28, 1935. J. M. TEAHEN APPARATUS FOR MOLDING WATER CLOSET RIMS FiledFeb. 12, 1954 INVENTOR Jam as /t 7&42 e11 ATTORNEYS Patented May 28,1935 UNITED STATES PATENT OFFICE APPARATUS FOR MOLDING WATER CLOSET anus4 Claims.

The invention relates to the manufacture of water closet bowls of thetype provided with channeled flushing rims. It is the object of theinvention, first, to obtain a method of molding a rim separate from thebowl but which is subsequently integrated therewith, said rim havingmolded-in inclined recesses for forming water discharge ports againstthe inner face of the bowl. It is a further object to obtain aconstruction of molding apparatus by which the rim may he formed asdescribed, and which provides further removal of the mold in sectionswithout injury to the molded rim. With these objects in view theinvention consists in the construction as hereinafter set forth.

In the drawing:

Fig. 1 is a. horizontal section through a portion of a water closet bowlshowing the rim applied thereto;

Figs. 2 and 3 are respectively a horizontal section on line 2-2 and avertical section on line 3-3 of Fig. 1;

Fig. 4 is a cross section through the rim forming mold;

Fig. 5 is a similar view showing the mold reversed and with one sectionremoved therefrom;

. Fi 6 is a plan view of the mold showing portions thereof in horizontalsection.

As shown in Figs. 1 to 3 inclusive, A is the water closet bowl and B isthe hollow rim which is separately cast from the bowl, being providedwith a horizontal flange B overlapping the top of the bowl andintegrated therewith along the line B The rim B is further provided withthe downwardly extending portion B and the outwardly extending flange Bat its lower end which bears against the inner face of the bowl and isintegrated therewith. In the flange B are formed molded-in inclinedrecesses D which connect with the channel E within the rim and inconnection with the wall of the bowl form downward discharge ports.

The usual method of molding clay for forming ceramic structures is tofill porous plaster molds with fluid clay or what is known as slip, thewater being extracted and absorbed by the pores of the mold, leaving thesolid clay in the mold cavity. I employ this general method for formingthe rim of the bowl but on account of its peculiar construction it isnecessary to modify the apparatus and to some extent change the method.This modification is necessary, first, because the rim is of channelcross section, the channel opening inwardly or towards the center of therim; second, the inclined ports in the lower flange of the rim alsonecessitate modification in the form of the mold sections.

As illustrated in Figs. 4 to 6 inclusive, the mold 10: forming the rimcomprises a base section F, a top section G, and a plurality of ringsegment sections H which engage a recess in the section F. The segmentsH are preferably four in number distributed about the rim, each sectionbeing limited in length so that it can be drawn out of engagement withthe molded rim without interierence because of the molded-in ports inthe flange of the rim. The abutting ends of the sections are also soinclined that the division plane does not cross the inclined ports,thereby avoiding any roughness or change in form of any of said ports.In cross section, each of the segments H is of a downwardly taperingtruncated conical form and flts a corresponding recess I in the sectionF. The section F is also fashioned to form a recess or mold cavity Jadjacent to one side of the segments H which forms the portion B of therim. The flange B of the rim is formed in a recess K in the side of thesegments H and the horizontal flange B is formed by a recess L in thetop section G of the mold. Also the inclined recesses which form theports D are molded in by angular projections M in the recess K.

All of the parts of the mold above described are formed of porousplaster which will absorb water from the slip, leaving solid clay in themold cavity. In the method of molding, the segments H are placed in therecesses I in the base section F, after which the top section G isplaced on the sections F and H to complete the annular mold cavity, itbeing understood that these sections have suitable dowels (not shown)for holding the same in fixed registration. The slip is then poured intothe mold cavity through a suitable spruc opening (not shown) and afterstanding for the required length of time to absorb the water the mold isreversed into the position shown in Fig. 5. The section F is then liftedoff, this being permitted by the tapering cross sectional form of thesegments H, which provides the necessary draft. The sections H are nextremoved successively. The first section to be removed has its ends H, Hat such an angle to each other and to the angle of the projections Mthat by carefully moving inward first one end and then the I them fromthe molded flanges B, B" of the rim. Finally the entire rim may bedisengaged from the recess L in the section G.

A rim formed by the method and apparatus above described is of veryaccurate shape which can be engaged with the molded bowl and integratedtherewith in the usual manner of joining clay sections with each other.When thus integrated with the bowl the ports D will all be of uniformcentral sectional areaandurfiform in the direction of inclination, beingalso free from any obstruction which would interfere with the flow ofwater therethrough. Thus in the completed structure the waterWonder-discharged from the channel E through the ports D will flushequally Well all sides of the .bowl.

Where the rim is applied to a bowl which has a flushing tank integraltherewith, portions of this flushing tank may be cast integral with therim, as indicated at N and 0, Fig, 6.

What I claim as my invention is:

l. A mold for casting channeled flushing rims for water closet bowlscomprising a plurality of segmental mold sections for moiding theundercut portions on opposite sides of said rim, a pair of matched moldsections for molding the external surface of said rim, one of saidsections being recessed to receive said segmental mold sections withdraft permitting of separation therefrom, and the other of said matchedmold sections forming a support for said segmental sections permittingof the lateral withdrawal of the same when said first matched section isremoved.

2. A mold for casting channeled flushing rims for water closet bowlscomprising a plurality of segmental mold sections together forming anannulus and fashioned to mold the undercut portions of said rim,including a flange for contacting with the inner face of the bowl andwith a series of spaced recemes in said flange, and a pair of matchedrecessed mold sections forming the mold cavity and defining the externalsurface of the rim, one of said sections being further re cessed toreceive said segmental mold sections to hold the same in fixed relationand providing draft for removal therefrom, and the other of said matchedmold sections forming a support for said segmental mold sections onwhich they may be laterally withdrawn from the molded rim afterdisengagement of said first matched mold sections.

3. A mold for casting channeled flushing rims for water closet bowlscomprising a plurality of segmental mold sections together forming anannulus and fashioned to mold the undercut portions of said channeledrim including a flange for contacting with the inner face of the bowl,and a series of spaced inclined portions for molding recesses in saidflange, the plane of separation between the abutting ends of saidsegmental sections being inclined to correspond with the inclination ofthe recess forming portions and arranged intermediate the same to avoidinterference therewith, and a pair of matched recessed mold sectiansforiforming the mold cavity and defining the external surface of therim, one of said matched sections being further recessed to receive saidsegmental sections and to hold the same in ifixed' relation, beingprovided with draft to permit of disengagement therefrom, and the otherof said matched sections forming a support on which said segmentalsections may be laterally withdrawn from engagement with the molded rim.

4. Arnold for casting channeled flushing aims for water closet bowlscomprising a plurality of segmental mold sections together roaming anannulusiand fashioned to mold the undercut portions of said channeledrim including a flange for contacting with the inner face of the bowl,and a series of spaced inclined portions for molding recesses in saidflange, the plane of separation between the abutting ends of saidsegmental sections being inclined to correspond with the inclination ofthe recess forming portions and arranged intermediate the same to avoidmterference therewith, and a pair of matched recessed mold sections forforming the mold cavity and defining the extemal surface of the rim, oneof said matched sections being further recessed to receive saidsegmental sections and to hold the same in fixed relation, beingprovided with draft to permit of disengagement therefrom, and the otheror said matchedsections forming a support on which said segmentalsections may be laterally withdrawn'from engagement with the molded rim,the inclination of the opposite ends of one of said segmental moldsections being sufficiently divergent topermit of withdrawal of the samein advance and without disturbance of the other segmental sections.

JAMES M. TEAHEN.

